Multipleshade holder



Nov. 23, 1937. p HENMNGSEN 2,100,078

MULTIPLESHADE HOLDER Filed March 21, 1936 I /m emor POI/L HEN/W/VGEN.

WQZ

' function of the shades.

Patented Nov. 23, 1937 UNITED STATES ENT OFFICE MULTIPLESHADE HOLDER Application March 21, 1936, Serial No. 70,011 In Sweden April 4, 1935 1 Claim.

This invention relates to an improvement in multiple-shade holders, and has for its object to remove the drawback consisting in the difficulty found in arranging in a simple and efficient manner the shades or reflectors surrounding the source of light, in such a manner that the shades or reflectors will occupy, and will continue to occupy, their predetermined position relatively to the source of light as well as relatively to the other shades.

The invention relates to a method of solving this problem, which is of importance in connection with modern lamp holders, in that the shades automatically, without the use of screws, clamps or other mechanical devices, and without the use of adhesives, owing to their mechanical or physical properties slip into grooves of special shape provided in the shade-holder of transparent or translucent material surrounding 20 the source of light, and thus remain firmly and immovably in position.

One construction, by way of example, is shown in the accompanying drawing, which is partly in section:

25 In the figure, l is the source of light and 2 the shade-holder encircling the same and being, preferably of a circular, polygonal or any other cross-section, all depending on the shape and The shades are marked 3, and consist of some substance suitable for the purpose and made, for example from cellulose or the like, that is capable of refracting, reflecting or diffusing light rays, and further possessing the characteristic of shrinking to a certain degree when dried.

The shade-holder 2 is fitted with grooves 4 serving to hold'and support the inner edges of the shades or reflectors 3, the inside diameter 5 of the said grooves being smaller than the outside diameter of the edge of the grooves, in such a manner that the shades or reflectors 3 can be placed into position in the grooves. Various methods may be employed for retaining the 10 shades or reflectors free in the grooves of the holder 2, a preferred example, when the shades or reflectors are formed of celluloid, cellulose or cellophane, being to first moisten the shade before placing the same on the holder and thereafter utilizing the heat radiating from the associated lamp to effect drying of the shade and shrinking of the same into position in the groove of the holder. The shades or reflectors may also be anchored in the grooves by pressing the edges of the shades into the grooves.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:-

In a multiple shade holder of the character described, a glass holder of transparent or translucent material having a series of concentric annular grooves therein and a shade associated with each groove, the material forming the shades possessing the characteristic of shrinking when first moistened and then dried, whereby the shades will have their inner edges shrunk into the grooves of the holder.

POUL HENNINGSEN. 

